fix: simplify and test registry setup

- Fix config.yml format
- Simplify Dockerfile with direct config copy
- Remove unnecessary volume mounts
- Tested working locally

Dockerfile

@@ -4,22 +4,4 @@ FROM registry:2
 RUN apk --no-cache add apache2-utils
 
 # Create config directory and add default config
-RUN mkdir -p /etc/docker/registry/ && \
-    echo 'version: 0.1\n\
-log:\n\
-  fields:\n\
-    service: registry\n\
-storage:\n\
-  cache:\n\
-    blobdescriptor: inmemory\n\
-  filesystem:\n\
-    rootdirectory: /var/lib/registry\n\
-http:\n\
-  addr: :5000\n\
-  headers:\n\
-    X-Content-Type-Options: [nosniff]\n\
-health:\n\
-  storagedriver:\n\
-    enabled: true\n\
-    interval: 10s\n\
-    threshold: 3' > /etc/docker/registry/config.yml
+COPY config.yml /etc/docker/registry/config.yml